Cleanup forward declarations.

core/include/fpdfapi/fpdf_render.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_RENDER_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_RENDER_H_
 
 #include <map>
 #include <memory>
 
 #include "core/include/fpdfapi/fpdf_page.h"
 #include "core/include/fxge/fx_ge.h"
 
 class CFX_GraphStateData;
 class CFX_PathData;
 class CFX_RenderDevice;
-class CPDF_FormObject;
 class CPDF_ImageCacheEntry;
-class CPDF_ImageObject;
-class CPDF_PathObject;
 class CPDF_RenderStatus;
-class CPDF_ShadingObject;
-class CPDF_TextObject;
 class IFX_Pause;
 
 class IPDF_OCContext {
  public:
   virtual ~IPDF_OCContext() {}
 
   virtual FX_BOOL CheckOCGVisible(const CPDF_Dictionary* pOCG) = 0;
 
   FX_BOOL CheckObjectVisible(const CPDF_PageObject* pObj);
 };
@@ skipping 223 matching lines @@
   CPDF_ImageCacheEntry* m_pCurImageCacheEntry;
   std::map<CPDF_Stream*, CPDF_ImageCacheEntry*> m_ImageCache;
   FX_DWORD m_nTimeCount;
   FX_DWORD m_nCacheSize;
   FX_BOOL m_bCurFindCache;
 };
 
 FX_BOOL IsAvailableMatrix(const CFX_Matrix& matrix);
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_RENDER_H_